The weather in Garmisch-Partenkirchen is extremely alpine and unpredictable. An hourly forecast is not a recommendation but a necessity for anyone venturing into the mountains or even just planning their day in the valley.
Mornings are cold, even in summer. The hourly forecast is crucial to catch the window of best visibility for a trip up the Zugspitze before the clouds move in.
Afternoons are the most dangerous time for thunderstorms. Temperatures can be pleasant, but the weather can change within minutes. Trust the hourly forecast and turn back in time if clouds are building up.
As soon as the sun disappears behind the mountains, temperatures plummet. Warm clothing is absolutely essential for any evening outdoors. The nights are very cold even in high summer.